Safety sling



Aug. 3, 1943. A. T. NlLssoN SAFETY SLING Filed June 6,' 1 942 ,4 T TOBNEVS -A further object of my invention Y the sling; and

f ParentedAug. 3, 1943 faszasia Applicatin Janes, 1942,"seriai1NQ5144egc1--` f Y f' '-5' 2 claims. (of. cela-7:4) Inthe use of a standard sling for supporting a load of boards or the like', the sling, after being bound ,around the Vboards and connected to a' winch for lifting, pulls away from the top boards vslightly and then slips along the boards a short distance during the-actual lifting operation, VThe top boards arevlikely to slip out and accidents ref` sult. The principal object of my inventionis to provide a safety sling for'loading lumber that will grip the pile of lumber in amanner` which will cause' the sling to tighten about the lumber hooks A- The'tWO SflandsY 8 `'and 9 forming the I endless supporting member C are passed under' the pile yof lumber as indicated in Figure 1. Y.A top cablebrrope indicated generally at'D has a con'- ventionalhook I secured at one end thereoiand f' v then the cablelis` looped at 'Il and' receivesthe hook-shaped portion I of the hook A with `va ypor-V tionj I2 'of the cableeirtending overgtheltop ofv the lumber -B. The cable D is then looped at I3V during lifting and this will prevent the sling from slipping along the pile.

a `device of the type described which isA extremely simple in construction and durable fand efri` cient for the purpose intended.

' Otherobjects and advantages -Will'appear in the following specification, and the novelrfeatures of the device will be particularly pointed out in the appended claims. f

kMy invention is illustrated in the accompanyis to provide and receives theI hook-shaped portion .ofgthe. other hook A. [The free end ofthe cable is now'v passed' through the hook I0 and is extended upg wardly as at I4 to'be attached to the rope (not shown) that connects to the ships winch. If de# f sired theportion VI4 mayl carry a'hook'inot shown) that issecured to aneyelet (not shown) ing drawing forming a part of this application, in

which: Y., vFigure 1 isa perspective View of a pile ofrlumber showing my safety sling applied thereto;

VFigure 2 is a detail view ofthe safety sling; t

Figure 3 is a side elevation of the hook used in Fig-ure 4 is a front elevation of the hook.. -f

ous changes or modifications may bejm'ade withinthe scope ofthe appended claims Without' departing from the spirit of the invention.

In carrying out my invention I provide' a safety 1 sling that has two hooks A of novelconstruction.-

The hooks are identical and oneof the hooks is shown in detail in Figures 3 and 4. The hook A is relatively wideand has Van open hook-shaped portion I` and a. closed looped portion or eye 2. I'he inner surface of the hook portion I is rounded asat 3 and the inner surface of the looped readily understood.

which in turn is carriedfby the rope Vor V`cab1ethat dextendstothewinch.-, Y b f VFrorrrthe foregoing description ofthe Various the operation thereof 'may be r parts ofthe device,

When the v.conventional when the lumberis'lifted.Y During .the actual lifting' of fthey load, the portion'V of the sling cover- 4`so While I have shown only the preferred form of myinvention, it should be understood thatvari` ing the top of the` lumber is pulled free of the lumber topa slight distance and this permitsv Y' the top boards to become Iloose and to slide` out ofthe sling My safety strap or sling overcomes' this disadvantage because' when it is vtightened around a pile of lumber, the strand I2 is pulled 'taut-across vthe top of` the.l lumber and cannot slide;'alongthe-lurnber during vthe lifting oper.- ation. The reasonthe strand I2 cannot slide is Q that the yvertical pull on the strand portion I4 c willvcause the rope D to'thread through the hook Y I and the two hooks A so as to bind the strand r tancearound vthe vertical vextending portionsof the ropes C and D f? portion 2 is rounded as at 4. The back 5 of the e hook is made flat seas to bearagainst the pileof lumber indicated generally at Bin Figure l.-

It is not necessary that the back of each hook Y contactwith the pile of lumberand I have purposely shown the two hooks in Figure 2 arranged so that the back of one of the hooks contacts with the lumber pile While the back of the other does not so contact.

In forming the safety sling, an endless rope or cable C has its turned back or looped portions 6 and 1 passed through the loops or eyes 2 v*of the portion I2rnore tightly about thelumber.

The rounded portions A3 onthehooks A permit this readyflsliding 4movementV of the cable D. The strand` I2 is initially placed at the load Which means that the will be varranged at right angles to the longitudinal axis ofthe lumber. The vloadv lis thereforeV held in a solid gripvev'en beforethe 'load-has fully left'the ground; Diiferent rial may be lifted'and the .hooks Avmay `be used .It will jbe seenl with cables, chains or ropes. thattheupper portion D ofthe device can VVbe the conventional sling v.except that instead of itV l being passedentirely around the load, itLis connected to Vthe hooksA.. When'it is so used, it

ceases to bethe conventional sling and forms a y sling is used, itisfimfpossible Vto tighten lthestran'dsaround the-lumber to Ya point where the strands willnot s lipy part of my device The other ends ofthe hooks A are then interconnected bythe double looped member C. The device Vis extremely simple in construction and forms a positive yet simple means for lifting lumberland other material without any chance of theY material sliding free.

Iclaim:v Y e Y 1 ,A safetyv sling compril 'ng an endless'strap having ftwo looped'portiona v"I ioolr-s) 'engaging "in the loopedportions, a;V s'econdstand -having' an automaticallyadjustable part with looped portions slidably' engaging with the hooks, said 'end-f1 less strap and automatically adjustable partico-- operating Ywith each other to formwthe safetyV for causing the slingfto tightnfaboittkie-loadf the second strand being entirely removable'fromv sling, and said'second strand havigia portionfi-i adapted to beV connected to aloald liftingmeans,

theY strap liookswhen loading or unloading the sling.V

2. A safety sling comprising an endless strap Vhaving two looped portions, rhooks connected to the strap at the looped portions, said strap adapted to underlie a pile of lumber or'the like with the hooks arranged along the sides of the pile, and aseparate load supporting strand having-@a tportion' fr )rmed--into4 fan *adjustable strap 'that overliesth'e top fthe lumber pile and has looped ends slidably connected to said hooks, :said strand when supporting the load automati- .f cally tighteningv the adjustable strandV and the i Willi-"prevet-"lumber from slipping from the pile; th ystrand being entirely removable from the `st f fks'ivhenloading or unloading the sling.

Y Y AXEL T. NILSSON.

'endless strap about the 'pile to an extent which Y 

